Malicious PDF — malware analysis report

Static analysis result for SHA-256 c79371835c8053cf…

MALICIOUS

PDF

38.8 KB Created: 2020-08-19 01:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c9060ae62ef24c9ac33a2fbfea13884 SHA-1: 09b083fe37cc42601e8caa8e017b0e041034d112 SHA-256: c79371835c8053cf09c82f867e4e0e8782bcf50ceec3a2a8565bf1e66e5763ea
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a download button, aiming to trick users into clicking it. The link leads to 'https://ttraff.cc/pify?keyword=baidu+root+apk+2018', which is a known malicious redirector. The document also hosts a large number of external PDF links, many of which are benign, but the presence of the malicious redirector is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=baidu+root+apk+2018 In PDF document text
    • http://files.vnchha.com/uploads/1/3/1/0/131071240/dcda938399c.pdfIn PDF document text
    • http://files.kellgallaher.com/uploads/1/3/1/1/131164488/8ef92a.pdfIn PDF document text
    • http://wesusibix.shelburnescouting.com/uploads/1/3/1/4/131407241/83171dffceb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8258/6014/files/public_health_nutrition_carter_center.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7336/2325/files/davetopujusefikor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/autodesk_autocad_2015_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8097/4490/files/cataclysm_dda_soundpack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7129/1035/files/embryology_notes_for_medical_students_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2936/3878/files/zelevidipepisevodoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/83227146561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zabaravoxetifup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/37444786775.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59FF 5376 bytes
SHA-256: 5c14d6d04da6f8e67bb1bcec91732f6c73f0e29440683ccb4f11a67a3383e6ad
font_01_sfnt_off00006c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C58 10152 bytes
SHA-256: 6850e90124cc677601238762a8759ed50d20e57e33eae05a27ccf935bc84faba

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